What minimum size manila line is required to...

Question 1 of 3104866636ee728f7522a1c51817b

What minimum size manila line is required to hold a weight of 932 pounds, if you use a safety factor of six?

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Question 1 of 31048

Q

What minimum size manila line is required to hold a weight of 932 pounds, if you use a safety factor of six?

🔍 Key Concepts

• Safety factor and how to apply it to a working load • Typical safe working loads (SWL) for manila line by circumference (inches) • Difference between breaking strength and safe working load

💭 Think About

• First, how do you turn a 932 lb load into the required breaking strength when the safety factor is 6? • Once you have the required breaking strength, how would you use standard tables of manila rope strengths to pick the correct circumference? • Why is it important to choose the smallest size that still meets or exceeds the required safe working load rather than just picking the largest?

✅ Before You Answer

• Be sure you multiply the working load by the safety factor before comparing to rope strengths • Use a reference of standard breaking strengths for manila line by circumference (e.g., per 46 CFR guidance or standard seamanship tables) • Confirm that the chosen line’s safe working load (breaking strength divided by safety factor) is at least 932 pounds